Patents by Inventor Charles A. Sperling

Charles A. Sperling has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Ball holder
    Patent number: 3943989
    Abstract: A ball holder includes a cage of a size to snugly hold at least two balls. The cage has an open side which is secured at least partway along its length to one face of a flexible racket cover. When the cover is on the racket, the cover is held taut so that it completely covers the open cage side, with the result that the balls are retained in the cage. However, when the cover is removed from the racket, it becomes limp, thereby exposing the unattached portion of the open cage side so a ball can be placed in and withdrawn from the cage.
    Type: Grant
    Filed: October 9, 1973
    Date of Patent: March 16, 1976
    Inventor: Charles A. Sperling
  • Spool holder
    Patent number: D281544
    Type: Grant
    Filed: December 27, 1983
    Date of Patent: December 3, 1985
    Assignee: Yours Truly, Inc.
    Inventors: Richard T. Michell, Charles A. Sperling